End lapping machine



10, 1935. H. VANDERBEEK 2,024,118 y END LAPPING MACHINE Fi1ed July 1,1935 2 sheen-sheet 1 H. VANDERBEEK END LAPPING MACHINE 2 sheets-sheet21,

Filed July 1, 1935 MMM UM aU/mk QN/ uw ww uw um Ev Illmm, QM Il MI!! u Ef MN M MNV E a o n\\ MN um Patented Dec. 10, 1935 END LAPPING MACHINEHerbert Vanderbeek, Canton, Ohio, assigner to The Timken Roller BearingCompany, Canton, Ohio, a corporation of Ohio 5.

Application July 1, 1935, serial No. 29,303

' e claims.' (ol. -5'1-,129i

My invention relates to lapping machines, par.

ticularly to a machine for lapping the ends of tapered bearing rolls andotherA conical articles. The invention has for its principal object the5 rapid and accurate end lapping of such articles at low cost.

'I'he invention consists principally in a roll end lapping machinecomprising a. rotary lap of spherically concave curvature and a pair ofopl posed rotary feed disks projecting into said lap and arranged tofeed a roll thereacross. 'Ihe in vention further consists in the endlapping machine and in the parts and combinations and ar rangements ofparts hereinafter descrbedand claimed.

In the accompanying drawings which form a part of this specification andwherein like symbols refer to like parts wherever they occur,

Fig. 1 is a front elevation of a lapping machine embodying my invention,

Fig. 2 is a side elevation,

Fig. 3 is a longitudinal vertical sectional view on the line 3-3 of Fig.2 showing the resilient mounting of one of the feed wheels,

Fig. 4 is a vertical sectional view on the line 4-4 in Fig. 3,

Fig. 5 is a fragmentary plan view showing the resilient mounting of themovable disk shaft and Fig. 6 is a partial sectional view on the line6-6 in Fig. 3.

Fixed on the reduced upper end I of a vertically disposed shaft 2 andenclosed by a suitable housing portion 3 of the machine frame 4 is alapping member 5 having a spherically concave upper lapping surface 6. Apair of opposed axially alined feed disks 1, 8 are mounted to rotate onhorizontal axes in opposite directions and at different speeds. Each ofsaid disks 1, 8 has around the outer periphery of its face afrusto-conical band 9 that tapers toward the center of said disk.

Thus the two bands 9 form a feeding'slot of conical shape and one ofsaid disks 8 is provided with resilient means, hereinafter described,forcing it toward the other disk 1. By this arrangement, a conical rollI0 placed in the slot formed by said bands 9 is held in place and hasits head or large end forced against the lapping surface 6. Thedifferential rotation of said disks 1, 8 causes said roll to be fedacross the lapping surface 6 at a speed depending upon the difference inthe speeds of rotation of the two disks. The large end of the roll I0 isthus given a spherically convex lapped surface. y

The drawings illustrate the preferred mechanism for rotating said lap 5and said feed disks 1,

i provided therefor in the machine frame.

8 and for resiliently mounting said disk 8. Mounted in spaced taperroller bearings Il in a vertically disposed casing I2 in the frame ofthe machine is a hollow shaft I3 having at its lower end a worm gear I4that is driven by a worm 5 I5. The lower end of said shaft 2 on whichsaid lap 5 is mounted projects into said hollow shaft I3'and is securedtherein by means of a key I6..

Mounted on the upper end of said hollow shaft Y I3 is a bevel gear I1that meshes with t-wo dial0 metrically opposed bevel gears I8, each ofwhich is mounted on a horizontally extending shaft I9 that is mounted injournal bearings 29 in the machine frame.

Each of said feed disks 1, 8 is mounted on the l5 end of a shaft 2I thatextends through a casing 22 that is capable of adjustment in a bore 23Spaced taper roller bearings 24 support each shaft 2I in its casing.Suitable nuts 25 are mounted on 20 threaded portions 26 of said shaftfor holding the bearings 24 in position. The outermost end of eachcasing 22 is provided with a closure cap 21 that has an upwardlyprojecting portion 28. One of said caps 21 is provided with a hole29through 25 which extends a bolt 30 that projects from the head 3l of ascrew 32 that extends into a threaded hole 33 in the frame of themachine whereby the cap is firmly held between said screw-head 3l and anut 34 on the end of said bolt portion 30. 30 Thus, by adjusting saidscrew 32, the position of said casing 22 and of the feed disk 1 may bechanged.

The cap 21 of the other casing 22 for the disk f 8 is provided with aslot 35 into which extends 35 a projecting stud 36 on the endof theadjusting screw -32a for said casing. On the frame on either side ofsaid casing 22 are bosses 31 to which are secured coil springs 38 Whoseother ends are secured to projecting pins 39 on said cap 21. By 40 thisarrangement of springs 38 and adjusting screw 32a, said casing ispermitted endwise movement, the adjusting screw limiting the movement inone direction.

Said lower horizontal shafts I9 are provided 45 with pulleys 40 on theirprojecting outer ends. 'Ihe shaft 2| that is mounted in the resilientlysupported casing has a pulley 4I on its outer -end that is driven by abelt 42 or the like passing over it and the pulley 40 of correspondinglower 50 drive shaft I9. The other shaft 2| has a some` what largerpulley 43. This difference in size between the pulley 4I and the pulley43 determines the rate of feed of` a roll across the lapping surface 6.

A suitable feed mechanism, illustrated diagrammatically in the drawings,feeds rolls, one at a time, into the space between the feed disks, therolls entering at the point 44. A guide block 45 engages the end of theroll and guides it into the outer peripheral portion of the lap. As theroll reaches the opposite side of the lap, a suitable pivoted ejectinghook 46 engages it and ejects it from the machine.

It will be obvious that the above lapping machine is a simple andinexpensive machine and that it will quickly and accurately lap the endsof conical rolls, giving them a spherically convex surface. Obviously,numerous changes may be made without departing from the invention, and Ido not wish to ybe limited to the precise construction shown.

What I claim is:

1. A lapping machine comprising a rotary spherically concave lap, a pairof spaced opposed disks having the same peripheral curvature as said lapand extending thereinto, and means for rotating said disks in oppositedirections and at different speeds, whereby an article held between saiddisks and against said lap is rotated on its own axis and fed across thesurface of said lap to receive a lapped convex surface.

` `2. A lapping machine comprising a, rotary spherically concave lap, apair of spaced opposed vdisks having the same peripheral curvature .assaid lap and extending into said lap with their axes normal to that ofsaid lap, said disks having opposed conical bands forming an annularslot of conical shape for receiving a conical roll and means forrotating said disks in opposite directions and at different speeds,thereby feeding a roll across said lap to lap they end thereof.

3. A lapping machine comprising .a rotary spherically concave lap, apair of spaced opposed disks 'having the same peripheral curvature assaid lap and extending into said lap with their axes normal to that ofsaid lap, said disks having opposed conical bands forming an annularslot of conical shape for receiving a conical roll, resilient meanspressing one of said disks towards the other thereby forcing a roll heldbetween said disks into endwise engagement with said lap and means forrotating said disks in opposite directions and at different speeds,thereby feeding a roll across said lap to lap the end thereof.

4. An end lapping machine comprising a frame, a vertical shaft rotatablymounted in said frame, a lap secured to the top of said shaft and havinga spherical concave upper lapping surface, a pair of spaced oppositedisks having the same peripheral curvature as said lapping aurface andextending thereinto, horizontally disposed rotary shafts secured to therespective disks. a casing for each of said shafts mounted for endwiseadjustment in said frame, bearings interposed between said shaftsv andthe respective casings, adjusting means for said casings,

,and means for rotating said vertical shaft and said horizontal shafts,said horizontal shafts in opposite directions to each other and atdiffereritspeeds.

5. An end lapping machine comprising a frame, a vertical shaft rotatablymounted in said frame, a lap secured to the top of said shaft and havinga spherical concave upper lapping surface, a pair of spaced oppositedisks having the same peripheral curvature as said lapping surface andextending thereinto, horizontally disposed rotary shafts secured to therespective disks. a casing for each of said shafts mounted for endwiseadjustment in said frame, bearings interposed between said shafts andthe respective casings, adjusting means for said casings, the adjustingmeans for one casing permitting endwise movement thereof, resilientmeans forcing said movable casing in the direction to move its disktowards the other disk and means for rotating said vertical shaft andsaid horizontal shafts, said horizontal shafts in opposite direction toeach other and at different speeds. 6. An end lapping machine comprisinga frame, a vertical shaft rotatably mounted in said frame, a lap securedto the top of said shaft and having a spherical concave upper lappingsurface, a pair of spaced opposite disks having the same peripheralcurvature as said lapping surface and extending thereinto, horizontallydisposed rotary shafts secured to the respective disks, a casing foreach of said shafts mounted for endwise adjustment in said frame,bearings interposed between said shafts and the respective casings,adjusting means for said casings, a hollow vertical shaft having a gearat its upper end and having the lower end of said flrst vertical shaftfixed therein, 'horizontal drive shafts in 45 alinement with said diskcarrying shafts, gears of equal size at the inner ends of said shaftsmeshing with said gear on said hollow shaft, pulleysI of equal sizes onthe outer ends of said shafts pulleys of different sizes on the outerends 4of said diskscarrying shafts and belt' connecting HERBERTVANDERBEEK.

